Muffle glass furnace



l'I H Dec. 23, w24. www@ P. EBELING MUFFLE GLAS S FURNACE Filed sept. 9, 1921 s shams-sheet '1 www@ De@ 23, w24.

3 'Sheets-Sheet 2 nec, 23, i924. l

Pl EBELNG MUFFLE GLAS S FURNACE Y Filed Sept. 9, 192].l 3 Sheets-Sheet ."5

Patented Dec. 23, M5524.

tilibillt snr-mar nBELrnG, or nantaise, onto.

Morena enses scimmie'e'.

Application filed September T o aZ 'whom 'it may concern.'

inniile which may enlarged, of a -boslilie Be it known that l, l-IULLir lnniirn'o, a citizen of` the United States ot' America, and

resident ot Bellaire, county of Belmont, and

4Ita-te of Ohio. hare invented certain new -and useful lii'iprovements in alulile Glass Furnaces, o'l which the following is a specification. l

,This invention relates broadly to annealingfurnaces, and more specifically to an ovenl or lehr of Inutile type designed pri-- mai-ily for annealing glassware, ceramic ware and the like.

. The primary object of the invention is to provide'a mntlie oven or lelir having a munie constructed of cast iron which shall possess various marked advantages over ordii'iaryv forms or types of lehrsembodying inutiles' constructed of tiles, blocks and like refractory materials.

Aefurther object is to provide a cast-iron be' operated over long, periods ottime. without warping or buckling of its parts and which eliectually preyents leakage of harmful gases and fumes to' the interior thereof.

With these and other important objects in View, which will hereinafter be pointed out, the intention resides in the features of construction, arrangement of parts and combinations of elements which will here inafterv be fully described, reierence'being had to the accompanying drawings, in which- Figure l is a .longitudinal section of a portion or" a inutile lehr embodying my invention;

.Figure 2 of the Figure 3 is anenlarged detail perspective view ott a castdron reel plate;

Figure l is similar View of an upright wall plate; l

l4`igiire 5-is a similar View of a bottom plate and#- Figure yt'is asimilar View, still further support for` the rollers upon which the ware-carrying pans is an enlarged transverse section n i l'rayell l v Referring to said drawings, l indicates the bottom, 2 the side walls, and 3 the crown l of tlxeoven,the same beingconstructed of 'brickor other refractory material, as ordinarily. Extending longitudinally throngh the oven 1s a muille composed of cast iron plates possessing a peculiar 'form whereby composed. The upright lianges 9, i921. Serial No. 499,485.

the usual annealing temperatures over relatively long periods of time without undue deterioration theyl are enabled to withstand and without warping. Said muiile is dis posed within the ovenwith its botto1n, side walls and roof spaced from the'eorresponding 'walls of the oven, so that heat generated within the-oven by the burning gases in the combustion chamberllocated beneath the crown 3 may 'more or less completely encirclesaid .inutile for heatingthe latter.

The bottom of the "militie, which is formed or' a plurality of connected cast-iron plates 5, is .supported by a plerality of transverse walls 6 which are spaced relatively `to provide one `or `more transversely extending fines '7, each communicating at its outer end with vertical'iiues 8 located adjacent to the side walls of the inuie and leading from the combustion chamber if y A centrallongitudinal flue 9 in open communication with the inner ends of cachet said fines 7 leads to a passage 10 having communication with a conduit l1 which leads to thestack (not shown). j

The plates 5 composingthe bottom of the mule are of identical form and 'are arranged in pairs), each of which constitutes a unit. The number of these units may be varied to any extent desired or according to the length ot inutile required by any lehr Structurae. Eaeliot said plates, clearly il- 'lustrated in Fig. 5, is a one-piece casting and relation and nave their inner end flanges closely secured togetlien'as by means of bolts The length of esv 16. Each vof said plates has its 4outer end 'i extended somewhat beyond the flange loto provide a seating yiedgefl' for the` lower end of 'one of the'upright cast-:iron plates 18 of which the sidewalls of the m'uiliey is 13 ofl later ally adjacent plates 5Lare secured in closely abutting yrelation by' means of bolts-'19. Each ,of said ,plates 5 has oppositely disposed'upward extensions or seats 20 formed i on the flanges 1 3' thereof at suitable points, said seats the oppositeends of box-like bearing members 2l on which are journaled the spindles being designed vto receive thereon' 220i rollers 23 designed to carry the traveling pans 24 upon which the ware to be an- -Iiealedis transportedthrough the muflle formed on the inner surfaces ot", saidflanges.

' 18 and vsaid seats 20, whereby said member lis retained 1n its seated position against chance displacement.-

Each of the plates 18 of which the sidev Walls of the muflle are composed hasy -a length approximately equal to the'height vabuttin desired for the sidewalls and a width corresponding to that of the bottom plates 5. Each pla-te 18 .comprises a rectangular panel 27 having laterali outwardly extending flanges 28, the flanges of adjacent plates being designed to occupy closely abutting relation and to be firmly secured together, as by -Ineans of bolts 29. The lower, end of the panel 27 seats upon the ledge 17 ofa bottom plate 5 behind, or inward of, .a transverse upstanding lip formed on said ledge.

Said lip has a length substantially corre? sponding tothe internal 'width of ,the plate 18 so that the o utstanding flanges' 280i' the latter abut the ends of said lip. y

-Supported by the side walls of the muflle is the roof, preferably of ridge-roof, or

able-roof, form, which is composed of' cast- 1ron platesl arranged in pairs with their inner .ends meeting midway between said side Walls. Each of said platescoinprises a rectangular panel 32 having downwardly extending lateral flanges 35, an inner end flange 34 and anv outer endflange 35. The plates composing each pair have their inner end flanges 34 dis osed in'closely abutting relation and rigidlly attached' together, as b bolts 36, While adjacent longitudinally a ined plates have their lateral flangesBB and secured together by bolts 37; Each p ate 31 has an integral extension or projection. 88 provided on its outer end ,ter-

mmated by a vertically dependingor downturned lip 39 which s/designed to interlock with the up erlend of the panel 27 of a wall plate 18. geld li spending to that o the plate 31 of which it forms a par and, consequently, to provide for4 the reception or accommodation thereof the, upper ends of the flanges 28 of lthe ziplate'sglS'are terminated short of the panel 27, as shown. Said lip 39y and the end flange 35 are 'spaced-relatively to'provid'e therebetween a channel 40 in which the up per-edge of the engaged wall plate 18 is more orV less snugly received, as shown in Fig. 2.

Each of the roof plates 31 has it upper face more or ,less deeply furrowed or cor- =rugated transversely whereby is formed 39 has a Width'correformflongitudinal' ribs 32". The roof com-l` posed of said plates has its outer, oritop,

vsurface coated to a suitable deptli witha protective covering 41 of arefractory oementitious material designed notv only to shield the castmetal plates from contact'- with the flame and the gases lin the combusytion chamber, which would'have a. deterioi'atmg effect upon the metal, but also to seal the joints between said plates against the passage of. gases and fumes 'which would otherwlse leak throughsaid Joints into the :mu-file chamber. The ribs 32"l not 'onlyserve to strengthen or reinforce the plates against tendency to warp or buckle 'under the in- 'i flnerice of the heat, lbut also to allow the vcoating 41 to obtain a firmer hold upon the plates', and the ribs 32" extending in a direc-tion transverse to that of the ribsSJl not only serve to additionally reinforce said plates, but also to provide increased surtace for'the radiation of heat into the muflle chamber and for insuring a more or less evenK distribution of such -heat throughout said chamber.

The inner surfaces of the upright -Wall i plates 18 are also longitudinally corrugated, providing ribs 18 'which' serve the same purposes as the ribs 32 of the roofing plates. The outer surfaces of said; plates 18 are transversely grooved to provide teeth-like ribs 18 which preferably have horizontal upper surfaces. as shown ,in Fig. 2, whereon support is had for a protectivecoating4 -42 'similar to' and .having the same as the 'aforesaid coating 41. l

The bottom plates 5 are'similarly pi'o. vided on opposite sides with ribs-5u and 5',

but the applicationiof a protective coating to the outer faces'ofl sa'id plates may be dispensed with, as the temperature to which. said plates are subjectedby the rpassage of `products ot' combustioirthrough the bottom fines 7 and 9 is materially lower than that to whichI the roof plates and wall plates are subjected, due to the earlier absorption of heat from said products;

27 are protected aainst heat and flame,l due to the fact that t ey are lembedded in the upright Walls or Webs "43 of refractory consequently, expansion and contraction of said plates .in said direction can not result 1n the production of cracks or crcvices purpose rae . y The lateral flanges 28 ofthe wall platesA i kanglelmrs menace through which fumes might obtain access to the inutile chamber.

The opposite ends ot the combustion chamber ar'e closed by arches i ot retractory blocks or tile which closely orerlie bolted to and supported by the opposite end plates 31 ot' the roof of the inutile.` Said bars are tree to move with respect tosaid arches so that expansion and contraction ot the rooi' in a lengthwise direction may occur n'ithout subjecting the jointsofy the root to strains which might be productive of cracks oncrevices.

` The joints betiyeen the outer end lianges of the roof plates 31 and the side walls 18 are closed by a lilling ,lli ot a suitable ce: ment or similar material, said filling closing the spaces between the ribs 18b oit said wall plates: and a filling 47 ot' sand `or other suitable material is likewisetprovidee tween the lower ends of said ,side-wall plates andthe outer end flanges of the .bottom plates 5.

- lVhat claimed is 1. A mutlle turnace comprising outer furnace walls and a crown, and a inutile extending longitudinally through said furnace and spaced. lfrom the latter toprovide a comnace. Walls and spectively,

bustion chamber and inutile Aencircling fines leading Jfrom said chamber, said'mulile consisting of a bottom, lside Walls anda roof, each composedof a plurality ot rigidly connected cast-metal plates,l and a refractory coating carried exteriorly by thefplates of said side Wallsand said roof.

2. A inutile furnace comprising a crown, andl ing longitudinally'through said furnace and outer furspaced from the latter to provide a cornbus` tion chamberl and inutile encircling flues leading from said chamber, said mulle consisting of a bottom, side Walls and a root', each composed ot a plurality of rigidly connected cast-metal plates, the w ll plates being carried upon"the outer ends of Vthe bottom plates, and the outer ends of the roof plates being seated upon and interloclied with the upper ends ot said Wall plates, and a refractory coating carried exteriorly the plates of the side Walls and the roof.

3. A muiile Jfurnace comprising outer fun nace Walls and a crown, and a Inutile extends mg longitudinally through said'furnace and spaced from the latter to provide a combustiony chamber and muffle encircling -tlues leading from said chamber, sisting of a bottom,4 side walls each composed nected cast-metal plates, the root plates and the bottom plates being interlocked upper and lower ends of the Wall plates, re-

and a refractory coating carried the plates of the side Walls and a' roof,

exteriorly by and the root.

4. A Inutile furnace comprising outer furl be@ a inutile extendbyv said Inutile con.

ot' a plurality of rigidly con-v with the nace walls and a crown, anda mutlle es tending longitudinally through `said tur nace and spaced from the latter to provide a combustion chamber and muie encircling lines leading from said chamber, said inutile the bottom plates, and the .outer ends ofthe root plates being seated upon the upper ends ot said Wall plates. said mule plates having the faces thereof ribbed, and a yrefractory coating carried exteriorly by the plates of the side walls and the roof. I

' 5; A muftle furnace compris'ng outer furnace walls and a crown, and a muliie extend ing longitudinally through saidt'urnace and spaced from the latter to provide a combustion chamber and inutile encircling fines leading from sa'id chamber, said muille. consisting of a bottom, side Walls and a roof, each composed ot a plurality of rigidly connected cast-metal plates, the wall plates beof the boting carried upon the outer ends tom plates, and the outer ends of the roof plates being seated upon the upper ends ot' said wall plates, each ofl said plates having its opposite faces of ribbed torni, the ribs of one face being transverse to those of the opposite face.

"' 6. A mufilc -furnace comprising outer furnace walls and a crown, and a muie extending longitudinally through said furnace and spaced from the latter to provide a combustion chamber and 'inutile encircling flues leading from saidchamber, said inutile con sisting ot' a bottom, sidewalls and a roof, eaclr composed of a plurality of rigidly connected cast-metal plates, the wall plates being carried upon thel outer ends of the bot.- tom plates, and the outer ends of the' root plates being seated upon the upper ends ot said wall plates, said wall plates and said roof plates having their outer faces ribbed transversely, and a refractory coating carried by said ribbed faces.

sev

7. A mulle furnace con'iprising outer furnace Walls and a crown, and a inutile extending longitudinally through said furnace anc. spaced from the latter to provide'a combus tion chamber and muttle encircling ytlues leading from said chamber, said inutile consisting of a bottom, side -walls and a roof, each composed of al plurality of flanged castmetal plates having their'langes disposed in abutting relationand connected by bolts directed therethrough, the root plates and the bottom platcs being interengaged with 0ppesite ends of said wall plates to allow free expansion' and contraction of each Without strain, and a refractory coating carried exterio'ly by the plates of the side Walls and the roof.

wallsand a-roof, each com sed of a.plu.v

rality of similar` cast-iron p ates, the plates of the bottom and roof being disposed in transverselyalined pairs with `their innerl ends rigidly attached, eac'li pair constituting a-unit, and adjacent -units being rigidly i attached, said wall plates lbeing loosely embraced at their upper and lower ends, respectively, by said roof plates and; said bottom .bottom and with the roof, and a'refra'ctoryl protectivel coatingcarried yby said side walls and .said roof.

10. -A Inutile connected cast-iron plates, saidfgide walls being connected with the bottoni the roof to permit -free expansion' and contraction of each without strain, and a refrac tory protective coating carried by said side walls and lsaid roof, the plates ofl said side walls and said vroof beingprovided with means for retaining saidoating in-place.

connected cast-iron .plateslfsi'iid side vwalls being connected with the bottom and with the roof to. permit free vefpansion and contraction offumich witliontxgstrain, and a refractory protective coati g carried by said side walls and .said roo the platt-,sof said side. walls and said roof beingprovided with trans\'(.rse ribs on their external faces.

- 12. A mullie having a'boltoin, side walls and a roof, each composed )t a plurality of having a bottoni, side lwalls and a roof, each composed of al plurality of and with ing lateral right-angleiflanges, said `11. A -niiiiilc having a bottonn'vsid'e walls and a roof, veach composedotl av plurality ofl i i I y connected castiron plates, said side Walls being connected with the bottom andf'with the roof to permit free .expansion and contraction of each without strain, and a re- 45 fractory protectivecoating carried byl said side walls and said roof, the plates of said "side walls and saidroof being provided with transverse ribs on their external faces and with longitudinal ribs on their internal 5 faces.y

i 13; A iniilllc vhaving a bottom, side walls Vand a roof, each composed of a plurality o-f connected cast-iron plates, each of said lates having its opposite faces ribbed, the ribs of onel face being transverse to those of the opposite'face.

14. A. muiilc. having a bottom, side Walls,

and a roof, each composed of a plurality of connectedI cast-iron plates, each of said pl/ates comprising a rectangular panel haviiiglateral right-angle flanges, said panel haring one face thereotl ribbed-longitudinally and thel 'opposite Vface ribbedftransversely.

15. A inullie having a bottoni, side wallsV anda) roof, each eomposei'l of a plurality of i connected cast-iron plat-es, each of said plates comprising a rectangular panel hav- Y anel having one face 'thereof ribbed longitudilv nally and the opposite face ribbed transversely,v tire bottoni plates having seats formed thereon. bearing m'eiiibersmounted on said seats, and pancarrying rollers jour- '7 naled on said-ii'ieinbers. In testimony whereof, 1 aiiix my signature iii presence rof two subscribing witnesses;

, y i PHILLIP EBELING. Witnesses:

A; T. MUHLE'MAM DAVID [WALKER 

